Home / 138,629.26-206,941.10-121,814.20

Finding the Fourth Proportional to 138,629.26, 206,941.10 and 121,814.20

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Solution

The fourth proportional to 138,629.26, 206,941.10 and 121,814.20 is: 181,840.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,629.26 : 206,941.10 = 121,814.20 : x
  2. Step 2: Convert to fraction form
    138,629.26/206,941.10 = 121,814.20/x
  3. Step 3: Cross multiply
    138,629.26x = 206,941.10 × 121,814.20
  4. Step 4: Simplify right side
    138,629.26x = 25,208,364,543.62
  5. Step 5: Solve for x
    x = 25,208,364,543.62/138,629.26
  6. Step 6: Final answer
    x = 181,840.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.